-"Simpler is better, except when complicated looks really cool."
-"As soon as you make something fool proof...along comes an idiot."
-"I have not failed. I've just found 10,000 ways that won't work." ~Thomas Edison
It looks just like every other cartesian printer, but with stainless sheet metal on the sides. I wonder what challenges they're talking about with microgravity. And I wonder how much they spent to make that thing and get it into space...
If it's going into space, I suspect it's mostly Titanium for the strength/weight ratio. When you factor in the $10,000/pound to get it into orbit, it's cheaper than steel.
As for lack of gravity, that means no natural airflow. Heat can't rise when there's no up. That also means adhesion is the ONLY thing attaching the object to the bed. On the up side, it may be possible to do some truly great prints without any supporting structure at all.